[deliverable/linux.git] / drivers / net / phy / mdio_bus.c

/*
 * drivers/net/phy/mdio_bus.c
 *
 * MDIO Bus interface
 *
 * Author: Andy Fleming
 *
 * Copyright (c) 2004 Freescale Semiconductor, Inc.
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 *
 */
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/unistd.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/phy.h>

#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>

/**
 * mdiobus_alloc - allocate a mii_bus structure
 *
 * Description: called by a bus driver to allocate an mii_bus
 * structure to fill in.
 */
struct mii_bus *mdiobus_alloc(void)
{
	struct mii_bus *bus;

	bus = kzalloc(sizeof(*bus), GFP_KERNEL);
	if (bus != NULL)
		bus->state = MDIOBUS_ALLOCATED;

	return bus;
}
EXPORT_SYMBOL(mdiobus_alloc);

/**
 * mdiobus_release - mii_bus device release callback
 * @d: the target struct device that contains the mii_bus
 *
 * Description: called when the last reference to an mii_bus is
 * dropped, to free the underlying memory.
 */
static void mdiobus_release(struct device *d)
{
	struct mii_bus *bus = to_mii_bus(d);
	BUG_ON(bus->state != MDIOBUS_RELEASED &&
	       /* for compatibility with error handling in drivers */
	       bus->state != MDIOBUS_ALLOCATED);
	kfree(bus);
}

static struct class mdio_bus_class = {
	.name		= "mdio_bus",
	.dev_release	= mdiobus_release,
};

/**
 * mdiobus_register - bring up all the PHYs on a given bus and attach them to bus
 * @bus: target mii_bus
 *
 * Description: Called by a bus driver to bring up all the PHYs
 *   on a given bus, and attach them to the bus.
 *
 * Returns 0 on success or < 0 on error.
 */
int mdiobus_register(struct mii_bus *bus)
{
	int i, err;

	if (NULL == bus || NULL == bus->name ||
			NULL == bus->read ||
			NULL == bus->write)
		return -EINVAL;

	BUG_ON(bus->state != MDIOBUS_ALLOCATED &&
	       bus->state != MDIOBUS_UNREGISTERED);

	bus->dev.parent = bus->parent;
	bus->dev.class = &mdio_bus_class;
	bus->dev.groups = NULL;
	dev_set_name(&bus->dev, "%s", bus->id);

	err = device_register(&bus->dev);
	if (err) {
		printk(KERN_ERR "mii_bus %s failed to register\n", bus->id);
		return -EINVAL;
	}

	mutex_init(&bus->mdio_lock);

	if (bus->reset)
		bus->reset(bus);

	for (i = 0; i < PHY_MAX_ADDR; i++) {
		if ((bus->phy_mask & (1 << i)) == 0) {
			struct phy_device *phydev;

			phydev = mdiobus_scan(bus, i);
			if (IS_ERR(phydev)) {
				err = PTR_ERR(phydev);
				goto error;
			}
		}
	}

	bus->state = MDIOBUS_REGISTERED;
	pr_info("%s: probed\n", bus->name);
	return 0;

error:
	while (--i >= 0) {
		if (bus->phy_map[i])
			device_unregister(&bus->phy_map[i]->dev);
	}
	device_del(&bus->dev);
	return err;
}
EXPORT_SYMBOL(mdiobus_register);

void mdiobus_unregister(struct mii_bus *bus)
{
	int i;

	BUG_ON(bus->state != MDIOBUS_REGISTERED);
	bus->state = MDIOBUS_UNREGISTERED;

	device_del(&bus->dev);
	for (i = 0; i < PHY_MAX_ADDR; i++) {
		if (bus->phy_map[i])
			device_unregister(&bus->phy_map[i]->dev);
		bus->phy_map[i] = NULL;
	}
}
EXPORT_SYMBOL(mdiobus_unregister);

/**
 * mdiobus_free - free a struct mii_bus
 * @bus: mii_bus to free
 *
 * This function releases the reference to the underlying device
 * object in the mii_bus.  If this is the last reference, the mii_bus
 * will be freed.
 */
void mdiobus_free(struct mii_bus *bus)
{
	/*
	 * For compatibility with error handling in drivers.
	 */
	if (bus->state == MDIOBUS_ALLOCATED) {
		kfree(bus);
		return;
	}

	BUG_ON(bus->state != MDIOBUS_UNREGISTERED);
	bus->state = MDIOBUS_RELEASED;

	put_device(&bus->dev);
}
EXPORT_SYMBOL(mdiobus_free);

struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr)
{
	struct phy_device *phydev;
	int err;

	phydev = get_phy_device(bus, addr);
	if (IS_ERR(phydev) || phydev == NULL)
		return phydev;

	err = phy_device_register(phydev);
	if (err) {
		phy_device_free(phydev);
		return NULL;
	}

	return phydev;
}
EXPORT_SYMBOL(mdiobus_scan);

/**
 * mdiobus_read - Convenience function for reading a given MII mgmt register
 * @bus: the mii_bus struct
 * @addr: the phy address
 * @regnum: register number to read
 *
 * NOTE: MUST NOT be called from interrupt context,
 * because the bus read/write functions may wait for an interrupt
 * to conclude the operation.
 */
int mdiobus_read(struct mii_bus *bus, int addr, u32 regnum)
{
	int retval;

	BUG_ON(in_interrupt());

	mutex_lock(&bus->mdio_lock);
	retval = bus->read(bus, addr, regnum);
	mutex_unlock(&bus->mdio_lock);

	return retval;
}
EXPORT_SYMBOL(mdiobus_read);

/**
 * mdiobus_write - Convenience function for writing a given MII mgmt register
 * @bus: the mii_bus struct
 * @addr: the phy address
 * @regnum: register number to write
 * @val: value to write to @regnum
 *
 * NOTE: MUST NOT be called from interrupt context,
 * because the bus read/write functions may wait for an interrupt
 * to conclude the operation.
 */
int mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val)
{
	int err;

	BUG_ON(in_interrupt());

	mutex_lock(&bus->mdio_lock);
	err = bus->write(bus, addr, regnum, val);
	mutex_unlock(&bus->mdio_lock);

	return err;
}
EXPORT_SYMBOL(mdiobus_write);

/**
 * mdio_bus_match - determine if given PHY driver supports the given PHY device
 * @dev: target PHY device
 * @drv: given PHY driver
 *
 * Description: Given a PHY device, and a PHY driver, return 1 if
 *   the driver supports the device.  Otherwise, return 0.
 */
static int mdio_bus_match(struct device *dev, struct device_driver *drv)
{
	struct phy_device *phydev = to_phy_device(dev);
	struct phy_driver *phydrv = to_phy_driver(drv);

	return ((phydrv->phy_id & phydrv->phy_id_mask) ==
		(phydev->phy_id & phydrv->phy_id_mask));
}

#ifdef CONFIG_PM

static bool mdio_bus_phy_may_suspend(struct phy_device *phydev)
{
	struct device_driver *drv = phydev->dev.driver;
	struct phy_driver *phydrv = to_phy_driver(drv);
	struct net_device *netdev = phydev->attached_dev;

	if (!drv || !phydrv->suspend)
		return false;

	/* PHY not attached? May suspend. */
	if (!netdev)
		return true;

	/*
	 * Don't suspend PHY if the attched netdev parent may wakeup.
	 * The parent may point to a PCI device, as in tg3 driver.
	 */
	if (netdev->dev.parent && device_may_wakeup(netdev->dev.parent))
		return false;

	/*
	 * Also don't suspend PHY if the netdev itself may wakeup. This
	 * is the case for devices w/o underlaying pwr. mgmt. aware bus,
	 * e.g. SoC devices.
	 */
	if (device_may_wakeup(&netdev->dev))
		return false;

	return true;
}

static int mdio_bus_suspend(struct device *dev)
{
	struct phy_driver *phydrv = to_phy_driver(dev->driver);
	struct phy_device *phydev = to_phy_device(dev);

	/*
	 * We must stop the state machine manually, otherwise it stops out of
	 * control, possibly with the phydev->lock held. Upon resume, netdev
	 * may call phy routines that try to grab the same lock, and that may
	 * lead to a deadlock.
	 */
	if (phydev->attached_dev)
		phy_stop_machine(phydev);

	if (!mdio_bus_phy_may_suspend(phydev))
		return 0;

	return phydrv->suspend(phydev);
}

static int mdio_bus_resume(struct device *dev)
{
	struct phy_driver *phydrv = to_phy_driver(dev->driver);
	struct phy_device *phydev = to_phy_device(dev);
	int ret;

	if (!mdio_bus_phy_may_suspend(phydev))
		goto no_resume;

	ret = phydrv->resume(phydev);
	if (ret < 0)
		return ret;

no_resume:
	if (phydev->attached_dev)
		phy_start_machine(phydev, NULL);

	return 0;
}

static int mdio_bus_restore(struct device *dev)
{
	struct phy_device *phydev = to_phy_device(dev);
	struct net_device *netdev = phydev->attached_dev;
	int ret;

	if (!netdev)
		return 0;

	ret = phy_init_hw(phydev);
	if (ret < 0)
		return ret;

	/* The PHY needs to renegotiate. */
	phydev->link = 0;
	phydev->state = PHY_UP;

	phy_start_machine(phydev, NULL);

	return 0;
}

static struct dev_pm_ops mdio_bus_pm_ops = {
	.suspend = mdio_bus_suspend,
	.resume = mdio_bus_resume,
	.freeze = mdio_bus_suspend,
	.thaw = mdio_bus_resume,
	.restore = mdio_bus_restore,
};

#define MDIO_BUS_PM_OPS (&mdio_bus_pm_ops)

#else

#define MDIO_BUS_PM_OPS NULL

#endif /* CONFIG_PM */

struct bus_type mdio_bus_type = {
	.name		= "mdio_bus",
	.match		= mdio_bus_match,
	.pm		= MDIO_BUS_PM_OPS,
};
EXPORT_SYMBOL(mdio_bus_type);

int __init mdio_bus_init(void)
{
	int ret;

	ret = class_register(&mdio_bus_class);
	if (!ret) {
		ret = bus_register(&mdio_bus_type);
		if (ret)
			class_unregister(&mdio_bus_class);
	}

	return ret;
}

void mdio_bus_exit(void)
{
	class_unregister(&mdio_bus_class);
	bus_unregister(&mdio_bus_type);
}
Commit	Line	Data
00db8189 AF	1	/*
	2	* drivers/net/phy/mdio_bus.c
	3	*
	4	* MDIO Bus interface
	5	*
	6	* Author: Andy Fleming
	7	*
	8	* Copyright (c) 2004 Freescale Semiconductor, Inc.
	9	*
	10	* This program is free software; you can redistribute it and/or modify it
	11	* under the terms of the GNU General Public License as published by the
	12	* Free Software Foundation; either version 2 of the License, or (at your
	13	* option) any later version.
	14	*
	15	*/
00db8189	16	#include <linux/kernel.h>
00db8189 AF	17	#include <linux/string.h>
	18	#include <linux/errno.h>
	19	#include <linux/unistd.h>
	20	#include <linux/slab.h>
	21	#include <linux/interrupt.h>
	22	#include <linux/init.h>
	23	#include <linux/delay.h>
3d1e4db2	24	#include <linux/device.h>
00db8189 AF	25	#include <linux/netdevice.h>
	26	#include <linux/etherdevice.h>
	27	#include <linux/skbuff.h>
	28	#include <linux/spinlock.h>
	29	#include <linux/mm.h>
	30	#include <linux/module.h>
00db8189 AF	31	#include <linux/mii.h>
	32	#include <linux/ethtool.h>
	33	#include <linux/phy.h>
	34
	35	#include <asm/io.h>
	36	#include <asm/irq.h>
	37	#include <asm/uaccess.h>
	38
298cf9be LB	39	/**
	40	* mdiobus_alloc - allocate a mii_bus structure
	41	*
	42	* Description: called by a bus driver to allocate an mii_bus
	43	* structure to fill in.
	44	*/
	45	struct mii_bus *mdiobus_alloc(void)
	46	{
46abc021 LB	47	struct mii_bus *bus;
	48
	49	bus = kzalloc(sizeof(*bus), GFP_KERNEL);
	50	if (bus != NULL)
	51	bus->state = MDIOBUS_ALLOCATED;
	52
	53	return bus;
298cf9be LB	54	}
	55	EXPORT_SYMBOL(mdiobus_alloc);
	56
46abc021 LB	57	/**
46abc021 LB	58	* mdiobus_release - mii_bus device release callback
78c36b15	59	* @d: the target struct device that contains the mii_bus
46abc021 LB	60	*
	61	* Description: called when the last reference to an mii_bus is
	62	* dropped, to free the underlying memory.
	63	*/
	64	static void mdiobus_release(struct device *d)
	65	{
	66	struct mii_bus *bus = to_mii_bus(d);
161c8d2f KH	67	BUG_ON(bus->state != MDIOBUS_RELEASED &&
	68	/* for compatibility with error handling in drivers */
	69	bus->state != MDIOBUS_ALLOCATED);
46abc021 LB	70	kfree(bus);
	71	}
	72
	73	static struct class mdio_bus_class = {
	74	.name = "mdio_bus",
	75	.dev_release = mdiobus_release,
	76	};
	77
b3df0da8 RD	78	/**
	79	* mdiobus_register - bring up all the PHYs on a given bus and attach them to bus
	80	* @bus: target mii_bus
e1393456	81	*
b3df0da8 RD	82	* Description: Called by a bus driver to bring up all the PHYs
	83	* on a given bus, and attach them to the bus.
	84	*
	85	* Returns 0 on success or < 0 on error.
e1393456 AF	86	*/
	87	int mdiobus_register(struct mii_bus *bus)
	88	{
161c8d2f	89	int i, err;
e1393456	90
e1393456 AF	91	if (NULL == bus \|\| NULL == bus->name \|\|
	92	NULL == bus->read \|\|
	93	NULL == bus->write)
	94	return -EINVAL;
	95
46abc021 LB	96	BUG_ON(bus->state != MDIOBUS_ALLOCATED &&
	97	bus->state != MDIOBUS_UNREGISTERED);
	98
	99	bus->dev.parent = bus->parent;
	100	bus->dev.class = &mdio_bus_class;
	101	bus->dev.groups = NULL;
036b6687	102	dev_set_name(&bus->dev, "%s", bus->id);
46abc021 LB	103
	104	err = device_register(&bus->dev);
	105	if (err) {
	106	printk(KERN_ERR "mii_bus %s failed to register\n", bus->id);
	107	return -EINVAL;
	108	}
	109
d1e7fe4d AB	110	mutex_init(&bus->mdio_lock);
d1e7fe4d AB	111
e1393456 AF	112	if (bus->reset)
	113	bus->reset(bus);
	114
	115	for (i = 0; i < PHY_MAX_ADDR; i++) {
4fd5f812 LB	116	if ((bus->phy_mask & (1 << i)) == 0) {
4fd5f812 LB	117	struct phy_device *phydev;
e1393456	118
4fd5f812	119	phydev = mdiobus_scan(bus, i);
161c8d2f	120	if (IS_ERR(phydev)) {
4fd5f812	121	err = PTR_ERR(phydev);
161c8d2f KH	122	goto error;
161c8d2f KH	123	}
64b1c2b4	124	}
e1393456 AF	125	}
e1393456 AF	126
161c8d2f	127	bus->state = MDIOBUS_REGISTERED;
e1393456	128	pr_info("%s: probed\n", bus->name);
161c8d2f	129	return 0;
e1393456	130
161c8d2f KH	131	error:
	132	while (--i >= 0) {
	133	if (bus->phy_map[i])
	134	device_unregister(&bus->phy_map[i]->dev);
	135	}
	136	device_del(&bus->dev);
e1393456 AF	137	return err;
	138	}
	139	EXPORT_SYMBOL(mdiobus_register);
	140
	141	void mdiobus_unregister(struct mii_bus *bus)
	142	{
	143	int i;
	144
46abc021 LB	145	BUG_ON(bus->state != MDIOBUS_REGISTERED);
	146	bus->state = MDIOBUS_UNREGISTERED;
	147
3e44017b	148	device_del(&bus->dev);
e1393456	149	for (i = 0; i < PHY_MAX_ADDR; i++) {
6f4a7f41	150	if (bus->phy_map[i])
e1393456	151	device_unregister(&bus->phy_map[i]->dev);
4dea547f	152	bus->phy_map[i] = NULL;
e1393456 AF	153	}
	154	}
	155	EXPORT_SYMBOL(mdiobus_unregister);
	156
298cf9be LB	157	/**
	158	* mdiobus_free - free a struct mii_bus
	159	* @bus: mii_bus to free
	160	*
46abc021 LB	161	* This function releases the reference to the underlying device
	162	* object in the mii_bus. If this is the last reference, the mii_bus
	163	* will be freed.
298cf9be LB	164	*/
	165	void mdiobus_free(struct mii_bus *bus)
	166	{
46abc021 LB	167	/*
	168	* For compatibility with error handling in drivers.
	169	*/
	170	if (bus->state == MDIOBUS_ALLOCATED) {
	171	kfree(bus);
	172	return;
	173	}
	174
	175	BUG_ON(bus->state != MDIOBUS_UNREGISTERED);
	176	bus->state = MDIOBUS_RELEASED;
	177
	178	put_device(&bus->dev);
298cf9be LB	179	}
	180	EXPORT_SYMBOL(mdiobus_free);
	181
4fd5f812 LB	182	struct phy_device mdiobus_scan(struct mii_bus bus, int addr)
	183	{
	184	struct phy_device *phydev;
	185	int err;
	186
	187	phydev = get_phy_device(bus, addr);
	188	if (IS_ERR(phydev) \|\| phydev == NULL)
	189	return phydev;
	190
4dea547f	191	err = phy_device_register(phydev);
4fd5f812	192	if (err) {
4fd5f812	193	phy_device_free(phydev);
4dea547f	194	return NULL;
4fd5f812 LB	195	}
4fd5f812 LB	196
4fd5f812 LB	197	return phydev;
	198	}
	199	EXPORT_SYMBOL(mdiobus_scan);
	200
2e888103 LB	201	/**
	202	* mdiobus_read - Convenience function for reading a given MII mgmt register
	203	* @bus: the mii_bus struct
	204	* @addr: the phy address
	205	* @regnum: register number to read
	206	*
	207	* NOTE: MUST NOT be called from interrupt context,
	208	* because the bus read/write functions may wait for an interrupt
	209	* to conclude the operation.
	210	*/
abf35df2	211	int mdiobus_read(struct mii_bus *bus, int addr, u32 regnum)
2e888103 LB	212	{
	213	int retval;
	214
	215	BUG_ON(in_interrupt());
	216
	217	mutex_lock(&bus->mdio_lock);
	218	retval = bus->read(bus, addr, regnum);
	219	mutex_unlock(&bus->mdio_lock);
	220
	221	return retval;
	222	}
	223	EXPORT_SYMBOL(mdiobus_read);
	224
	225	/**
	226	* mdiobus_write - Convenience function for writing a given MII mgmt register
	227	* @bus: the mii_bus struct
	228	* @addr: the phy address
	229	* @regnum: register number to write
	230	* @val: value to write to @regnum
	231	*
	232	* NOTE: MUST NOT be called from interrupt context,
	233	* because the bus read/write functions may wait for an interrupt
	234	* to conclude the operation.
	235	*/
abf35df2	236	int mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val)
2e888103 LB	237	{
	238	int err;
	239
	240	BUG_ON(in_interrupt());
	241
	242	mutex_lock(&bus->mdio_lock);
	243	err = bus->write(bus, addr, regnum, val);
	244	mutex_unlock(&bus->mdio_lock);
	245
	246	return err;
	247	}
	248	EXPORT_SYMBOL(mdiobus_write);
	249
b3df0da8 RD	250	/**
	251	* mdio_bus_match - determine if given PHY driver supports the given PHY device
	252	* @dev: target PHY device
	253	* @drv: given PHY driver
00db8189	254	*
b3df0da8 RD	255	* Description: Given a PHY device, and a PHY driver, return 1 if
b3df0da8 RD	256	* the driver supports the device. Otherwise, return 0.
00db8189 AF	257	*/
	258	static int mdio_bus_match(struct device dev, struct device_driver drv)
	259	{
	260	struct phy_device *phydev = to_phy_device(dev);
	261	struct phy_driver *phydrv = to_phy_driver(drv);
	262
5f708dd9 KG	263	return ((phydrv->phy_id & phydrv->phy_id_mask) ==
5f708dd9 KG	264	(phydev->phy_id & phydrv->phy_id_mask));
00db8189 AF	265	}
00db8189 AF	266
2f5cb434 AV	267	#ifdef CONFIG_PM
2f5cb434 AV	268
3d1e4db2 AV	269	static bool mdio_bus_phy_may_suspend(struct phy_device *phydev)
	270	{
	271	struct device_driver *drv = phydev->dev.driver;
	272	struct phy_driver *phydrv = to_phy_driver(drv);
	273	struct net_device *netdev = phydev->attached_dev;
	274
	275	if (!drv \|\| !phydrv->suspend)
	276	return false;
	277
	278	/* PHY not attached? May suspend. */
	279	if (!netdev)
	280	return true;
	281
	282	/*
	283	* Don't suspend PHY if the attched netdev parent may wakeup.
	284	* The parent may point to a PCI device, as in tg3 driver.
	285	*/
	286	if (netdev->dev.parent && device_may_wakeup(netdev->dev.parent))
	287	return false;
	288
	289	/*
	290	* Also don't suspend PHY if the netdev itself may wakeup. This
	291	* is the case for devices w/o underlaying pwr. mgmt. aware bus,
	292	* e.g. SoC devices.
	293	*/
	294	if (device_may_wakeup(&netdev->dev))
	295	return false;
	296
	297	return true;
	298	}
	299
2f5cb434	300	static int mdio_bus_suspend(struct device *dev)
00db8189	301	{
3d1e4db2	302	struct phy_driver *phydrv = to_phy_driver(dev->driver);
0f0ca340	303	struct phy_device *phydev = to_phy_device(dev);
00db8189	304
541cd3ee AV	305	/*
	306	* We must stop the state machine manually, otherwise it stops out of
	307	* control, possibly with the phydev->lock held. Upon resume, netdev
	308	* may call phy routines that try to grab the same lock, and that may
	309	* lead to a deadlock.
	310	*/
	311	if (phydev->attached_dev)
	312	phy_stop_machine(phydev);
	313
3d1e4db2 AV	314	if (!mdio_bus_phy_may_suspend(phydev))
3d1e4db2 AV	315	return 0;
541cd3ee	316
3d1e4db2	317	return phydrv->suspend(phydev);
00db8189 AF	318	}
00db8189 AF	319
2f5cb434	320	static int mdio_bus_resume(struct device *dev)
00db8189	321	{
3d1e4db2	322	struct phy_driver *phydrv = to_phy_driver(dev->driver);
0f0ca340	323	struct phy_device *phydev = to_phy_device(dev);
541cd3ee	324	int ret;
00db8189	325
3d1e4db2	326	if (!mdio_bus_phy_may_suspend(phydev))
541cd3ee AV	327	goto no_resume;
	328
	329	ret = phydrv->resume(phydev);
	330	if (ret < 0)
	331	return ret;
	332
	333	no_resume:
	334	if (phydev->attached_dev)
	335	phy_start_machine(phydev, NULL);
	336
	337	return 0;
00db8189 AF	338	}
00db8189 AF	339
2f5cb434 AV	340	static int mdio_bus_restore(struct device *dev)
	341	{
	342	struct phy_device *phydev = to_phy_device(dev);
	343	struct net_device *netdev = phydev->attached_dev;
	344	int ret;
	345
	346	if (!netdev)
	347	return 0;
	348
	349	ret = phy_init_hw(phydev);
	350	if (ret < 0)
	351	return ret;
	352
	353	/* The PHY needs to renegotiate. */
	354	phydev->link = 0;
	355	phydev->state = PHY_UP;
	356
	357	phy_start_machine(phydev, NULL);
	358
	359	return 0;
	360	}
	361
	362	static struct dev_pm_ops mdio_bus_pm_ops = {
	363	.suspend = mdio_bus_suspend,
	364	.resume = mdio_bus_resume,
	365	.freeze = mdio_bus_suspend,
	366	.thaw = mdio_bus_resume,
	367	.restore = mdio_bus_restore,
	368	};
	369
	370	#define MDIO_BUS_PM_OPS (&mdio_bus_pm_ops)
	371
	372	#else
	373
	374	#define MDIO_BUS_PM_OPS NULL
	375
	376	#endif /* CONFIG_PM */
	377
00db8189 AF	378	struct bus_type mdio_bus_type = {
	379	.name = "mdio_bus",
	380	.match = mdio_bus_match,
2f5cb434	381	.pm = MDIO_BUS_PM_OPS,
00db8189	382	};
11b0bacd	383	EXPORT_SYMBOL(mdio_bus_type);
00db8189	384
67c4f3fa	385	int __init mdio_bus_init(void)
00db8189	386	{
46abc021 LB	387	int ret;
	388
	389	ret = class_register(&mdio_bus_class);
	390	if (!ret) {
	391	ret = bus_register(&mdio_bus_type);
	392	if (ret)
	393	class_unregister(&mdio_bus_class);
	394	}
	395
	396	return ret;
00db8189 AF	397	}
00db8189 AF	398
dc85dec6	399	void mdio_bus_exit(void)
e1393456	400	{
46abc021	401	class_unregister(&mdio_bus_class);
e1393456 AF	402	bus_unregister(&mdio_bus_type);
e1393456 AF	403	}